Table 4. Comparisons between Plesiaceratherium tongxinense sp. nov. (IVPP V 23959) and other species of the genus Plesiaceratherium (after Mermier, 1895; Répelin, 1917; Wang, 1928; Young, 1937; Heissig, 1972; Antunes & Ginsburg, 1983; Ginsburg & Bulot, 1984; Yan & Heissig, 1986; Antoine, 2002; Becker & Tissier, 2020).

Species/Characters	P. tongxinense sp. nov.	P. gracile	P. platyodon	P. fahlbuschi	P. lumiarense	P. aquitanicum	P. balkanicum
Frontoparietal crests	Closed	Sagittal crest	–	Closed	–	–	–
Distance between the posterior edge of the nasal notch and the orbit	67 mm	66–67 mm	58 mm	43–35 mm	–	–	–
The relationship between protoloph and ectoloph on P2	connected	connected	–	connected	connected	separated	separated
Premolars	semi-molarized	semi-molarized	semi-molarized	molarized	semi-molarized	molarized	molarized
crista on the upper molars	absent	present	–	absent	absent	present	absent
crochet on the upper molars	strong	strong	weak or absent	strong	strong	strong	strong
constrictions of the protocone and hypocone on the upper molars	strong	weak	–	strong	strong	–	strong
the outline of M3 in occlusal view	quadrangular	–	triangular	quadrangular	quadrangular	triangular	quadrangular
Cheek teeth	developed cement	without cement	without cement	without cement	without cement	without cement	without cement
Distance between anterior end of symphysis and mandible angle	470 mm	433–435 mm	455 mm	435 mm	–	–	–
Length of symphysis along median plane	153 mm	89–96 mm	96 mm	80–108 mm	–	–	–